鄂尔多斯盆地白垩系三维地质建模研究
On the 3-dimentional Geological Modeling of Cretaceous System in the Ordos Basin
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摘要: 鄂尔多斯白垩系盆地三维地质建模是三维地下水数值模拟的基础。对于大尺度复杂区域的地质建模,选择了新一代三维地质建模软件GOCAD。以现有的钻孔、物探和地质基岩图等数据为基础,建立了以ArcGIS为平台的含水层地下水信息系统,以数字高程模型(DEM)作为地表模型,用离散光滑插值方法建立白垩系各含水岩组地质模型和地质体模型。经过误差分析,所建立的地质模型能满足当前的精度要求,同时也验证了建模思路的可行性。Abstract: 3-dimenional geological model provides the base for the 3-dimenional ground water modeling in the Cretaceous Artesian basin(CAB)of the Ordos Basin.State-of-the-art code,GOCAD was used,due to large scale and complexity of the study area.The geological model was developed based on the existing borehole data,geophysical data and geological maps stored in ArcGIS database.The surface model was constr ucted on the digital elevation model and other models for the water-bearing formations and geological bodies of the Cretaceous were developed using discrete Smooth Interpo lation technique.Judging from the error analysis,t he model reaches the requirement of the current study and varies the feasibility of the model development methodology.
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Key words:
- Cretaceous artesian basin /
- 3-dimenional geological modeling /
- GOCAD
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